Mode of producing cement clinker.



PATLNTLL JULY so. 1907 1,699. l l No 86 H. G. BLRNHULST L J. W. FULLER,JR.

MODELL" PRODUULNG GLMLN'L'GLLNKLL.

APPLICATION FILED JAN. 22. 1907..

NVENTRS Mm Imi MM TTRNEY.

. Td-ll whom imay Besitknown that we, HENhY G.- BARNHUns'r and ,Janne`W. FULLER, l.'[r.,.both citizensoi the United andl residing atCatasauqua, in theA county of and State of' Pennsylvania, have jointlyin- .vented certain new andv useful Improvements in the r 'UNITED STATESPATENT- union..

HENRY 'G'. BARNHURST AND JAMES W. FULLER, JR., OF CA'IADAUQUA,YENVNSYINANIA.

MODE F PRonUeING CEMENT CLINKER.

'. Modes of Producing' Cement Clinker in the Manufacparticularlyto themaintaining and-agitating of .fin ly ture of Cement, of which 'thefollowing is a specification. .4 I

Our invention hasrelation to the mode of producing .celiient clinker,in' which certain economies in theT quantity and quality of fuelemployed in connectiony therewith are derived, as hereinafter described;ang

in such general 'connection our invention relates moi/'a I divided rawcement materials and finely divided fuel,

with such fuel consumed by the time the clinkering is effeeted.`

The principal object of our invention is to provide a mode of producingcement clinker by subjecting finely divided raw cement materials mixedwith finely dividelgjfuelj'in a rotary revcrheratory kilnto exposegrainser particles of the materialsand fuel, `both in a non-cohcringcondition to the influence 'of the highly 'heated gases and air ofthekiln derived from the primary fuel of thekilnus well as to theinfluence'of the highly heated wall ofthe kiln, the heating of'v whichemanate'd from the same source, to thereby effect not only thoroughclinkering of the cement materials, but also to obtain a higherresultant efficiency from the combustion of the finely divided fuelmixed with such raw cement materials in the production of the cementclin er, with thereby a great saving in the quantity of u mployed in theproduction of a given quantity of cement clinker' and'- with a markedincrease of the quantity 'of 'clinker obtained in a giventime-alslcompuredwith the time and quantity and characterjef fuelrequired to convert .raw cement materials into piecesor lumps as well'asthe supply obtained, for subsequently by 'grinding or pulverizingbringin into the condition of cement, for use.

The nature and scopeof our inventionlwill bcmoreiully'understood fromthe following description taken in connection'with the`accompanyiIig4drawings form` fire-brick, a bin for containingjthc finely divided dryraw materials and finely divided fuel, Vmeans for conducting `themixture 'of thesaid materials and of the fuelf both innon-coherincnditions into the rotary reverheratory kiln, and v'with' anoutlet for the clinkered Specifica-tion of Letters Patent. Applicationnea January 2,1901 serial No. 353,516.

Patented J uly 30, 1907.

cement material arranged in the wall at the .discharge `end of the saidkiln, the same covering one nie-uns, which has been found practicallyefficient, for carrying into eff ect the mode of our said invention; andFig. 2, is a detail view, illustiatingin elevation thewall und with an.inlet arranged therein for introducing a fuel or the heat of such iuclinto the kiln, under the in-` uence of an air hlast or suita.lleie,adi1rg device. /l Referring to the drawings 3, is a rotaryrevtaheratory kiln, consisting of a metal shell lined with ro brick,which is held in a slightly hin-lined posi rn/'lrom the horizontal andterminatcsot the lower or c ucharge end lf2, in a wall 6. rPreferably infront of the stach and asc 4, and in alinement with the kil-n 3, isarranged a bin 7, which by means of a conveyor S, and feeding tube ll,passing partly througii'the basefl, and ste-cla 5, is connected directlywithlthe kiln, In the hin 7, are placed the raw cement materials to beclinkered, in a dry condition and in a finely divided state, such. as

cement rock or an equivalent material, as clay, having.

the-same constituents in silica, lime and alumina, as the cement rockand limestone and also the finely divided fuel, consisting of coke orbituminous or anthracite coal, in a dry state, which latter isthoroughly mixed Witlxfthc raw materials prior to the introduction ofboth into the kiln 3. The mixture of raw cement 'materials and fuel insuch finely dividediand non-coheling state by the conveycr 8, isconducted from the bin 7, into the feeding end l/l, of the rotaryreverberatory kiln 3, in which the same is advanced by the rotations ormovements of such kiln, during treatment therein. l Y l In the wall 6,is arranged an opening 9, through which a fuel such as pulverized coalor the heat of such fuel under the influence of an air blast or feedingdevice cany be introduced inthe kiln.

The fuel is introduced at the feedingfeiud 14, of the kiln 3, as well asat the discharge end l2l^tliereof- The fuel entering at the feeding endle., is :finely 'Y and mixed thoroughly with the finely piilverizedcement materials. The fuel introduced at the discharge end 12, of thekiln 3, is termed the primary fuel and that mixed with the cementmaterials and admitted atl The kiln heingvcylindri'cal-in form-aud beingcontinuously rotated, while in use, any given 'transverse section willhe equally heated in its whole circumference. Whenv the Vkilnishighfyfhcated say to a temperature of 2400" Fahrenheit, the charge ofrawcement materials with which the secondary fuel is thoroughly mixed isfed in a continuous stream into the feeding end 14, of

nue'lxly mixed and feeding the same in their non -cohex'ingcomlitionsinto a rotary kiln and feeding fuel into the kiln therewith toconjointly act by its consumption upon all separated non-colierlngparticles of said materials to eleet thereby a quick-md thoroughcliukering thereof.

G. The mode ofproducing ement clinker, which consists in introducingfuel at different points into a. rotary kiln, the fuel vfrom one pointt0 re and maintain the kiln in a highly heated condition and the fuelfrom the other mired4 with the different yraw cemen materials innon-coliering eondilons to elet byits: comgustion the perfehtor com- J.WALTER Douanes, Guo. W. imm.

